<!doctype html>
<html lang="zh-cn">
<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="lib/css/bootstrap.css">

    <title>Bootstrap初体验</title>
</head>
<body>
<div class="container" style="background-color: hotpink;height: 100px">
    <h1>Hello, world!</h1>
</div>

<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="lib/js/jquery-3.4.1.js"></script>
<script src="lib/js/popper-2.4.4.js"></script>
<script src="lib/js/bootstrap.js"></script>
</body>
</html>